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DURATEC Ti-VCT Performance (2012-Current) The place to chat about any Duratec 2.0L Ti-VCT engine performance, tuning and exhaust related upgrades.

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Old 01-22-2013, 09:01 PM   #21
suss6052
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Quote:
Originally Posted by 1948 panhead View Post
Is the K&N open on the end?
Not the drop in filter. The one that comes with the 57S lid kit has a removable plug for the end of the filter
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Old 01-22-2013, 09:34 PM   #22
1948 panhead
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The one that cast 170.00?
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Old 01-23-2013, 10:53 AM   #23
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Originally Posted by suss6052 View Post
The 2.5" would have a lower restriction than the 2.25" tubing, however if you go too large you reduce the backpressure too far and start to hurt performance.

Its been discussed that the 2.5" might be a better plan if you are planning on adding additional power adders down the line. If the limit of your modding is an intake and exhaust and nothing else a 2.25" exhaust may work better.
Back pressue is not a factor in direct injection engines, as fuel charge scavenging can not happen, becasue the fuel charge is delivered at full compresion.
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Old 01-24-2013, 04:53 AM   #24
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Are you asking if it's a CAI? No...it's a drop in...in the air box.
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Old 01-26-2013, 07:58 PM   #25
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Back pressue is not a factor in direct injection engines, as fuel charge scavenging can not happen, becasue the fuel charge is delivered at full compresion.
No but you still need to clear the combustion chamber of burned gases.
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Old 01-28-2013, 10:39 AM   #26
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No but you still need to clear the combustion chamber of burned gases.
Yes, that's why we have such things as cam overlap. Back pressure would prevent some gasses from leaving the chamber.n

Remember these motors run 12:1, they are probably pretty good at clearing the cylinder anyway.
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Old 01-28-2013, 01:42 PM   #27
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Has anyone seen more than 2-3 mpg increase with the exhaust?? Not that it should but who knows its possible to get 4-5 with an intake and exhaust system right?
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Old 01-28-2013, 03:16 PM   #28
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Has anyone seen more than 2-3 mpg increase with the exhaust?? Not that it should but who knows its possible to get 4-5 with an intake and exhaust system right?
With the Magnaflow and the Steeda CAI I haven't noticed a change in my mpg at all. It's still roughly 34mpg in the city with winter tires and 32mpg with summer.
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Old 01-30-2013, 07:36 PM   #29
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Back pressue is not a factor in direct injection engines, as fuel charge scavenging can not happen, becasue the fuel charge is delivered at full compresion.
You want too still cram as much air as possible with a scavenging affect. Air is still a factor in power making.
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Old 01-31-2013, 08:29 AM   #30
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You want too still cram as much air as possible with a scavenging affect. Air is still a factor in power making.
Right, and having less exhaust backpressure, by removing restrictions in the exhaust system will increase this effect to a point.

People are getting all bent outa shape about loosing back pressure in these Focus motors, it's not as much of a foctor as say a Honda. Opening up the exhaust systems on these new Focus engines is really going to wake them up.
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